This week's book giveaway is in the OCAJP forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide 1Z0-808 and have Jeanne Boyarsky & Scott Selikoff on-line! See this thread for details.
We don't have ActionForward's in Struts 2, so there's no reason to query the mapping. All Struts 2 actions return String instances which correspond directly to the entries in the configuration XML.
Struts 2 is very different from Struts 1 so you should have a look at our Struts 2 FAQ and read some of the tutorials.